{
  "threat_severity" : "Moderate",
  "public_date" : "2016-05-06T00:00:00Z",
  "bugzilla" : {
    "description" : "squid: SIGSEGV in ESIContext response handling",
    "id" : "1334786",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1334786"
  },
  "cvss" : {
    "cvss_base_score" : "4.3",
    "cvss_scoring_vector" : "AV:N/AC:M/Au:N/C:N/I:N/A:P",
    "status" : "verified"
  },
  "cwe" : "CWE-20",
  "details" : [ "Double free vulnerability in Esi.cc in Squid 3.x before 3.5.18 and 4.x before 4.0.10 allows remote servers to cause a denial of service (crash) via a crafted Edge Side Includes (ESI) response.", "An incorrect reference counting flaw was found in the way Squid processes ESI responses. If Squid is configured as reverse-proxy, for TLS/HTTPS interception, an attacker controlling a server accessed by Squid, could crash the squid worker, causing a Denial of Service attack." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 6",
    "release_date" : "2016-05-31T00:00:00Z",
    "advisory" : "RHSA-2016:1138",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6",
    "package" : "squid-7:3.1.23-16.el6_8.4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "release_date" : "2016-05-31T00:00:00Z",
    "advisory" : "RHSA-2016:1140",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6",
    "package" : "squid34-7:3.4.14-9.el6_8.3"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "release_date" : "2016-05-31T00:00:00Z",
    "advisory" : "RHSA-2016:1139",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7",
    "package" : "squid-7:3.3.8-26.el7_2.3"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 5",
    "fix_state" : "Not affected",
    "package_name" : "squid",
    "cpe" : "cpe:/o:redhat:enterprise_linux:5"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2016-4556\nhttps://nvd.nist.gov/vuln/detail/CVE-2016-4556\nhttp://www.squid-cache.org/Advisories/SQUID-2016_9.txt" ],
  "name" : "CVE-2016-4556",
  "csaw" : false
}